Bolt-on cylinder kit and method for increasing the displacement of an engine
View Patent ↗A cylinder for a V-twin engine including a body with a first end having a surface configured to mate with a cylinder head, and a second end configured to mate with a crankcase. A sleeve is fixedly secured within the body to define a cylinder bore. The sleeve includes a first portion that extends from the first end of the body to the second end of the body. The first portion of the sleeve has a first wall thickness. The sleeve further includes a second portion that extends out of the second end of the body to be received within a crankcase bore. The second portion has a second wall thickness that is thinner than the first wall thickness. The sleeve is constructed from a chromoly steel alloy material, and the second wall thickness is less than 0.060 inch.
1. A cylinder for a V-twin engine, the cylinder comprising:
a body including a first end having a surface configured to mate with a cylinder head, and a second end configured to mate with a crankcase; and
a sleeve fixedly secured within the body to define a cylinder bore;
wherein the sleeve includes a first portion that extends from the first end of the body to the second end of the body, the first portion of the sleeve having a first wall thickness;
wherein the sleeve further includes a second portion that extends out of the second end of the body to be received within a crankcase bore, the second portion having a second wall thickness that is thinner than the first wall thickness;
wherein the sleeve is constructed from a chromoly steel alloy material; and
wherein the second wall thickness is less than 0.050 inch.
2. The cylinder of claim 1 , wherein the body includes an exterior surface having a plurality of fins.
3. The cylinder of claim 1 , wherein the body is solid, having no internal voids or cooling jackets for cooling liquid.
4. The cylinder of claim 1 , wherein the body further includes a flange proximate to the second end, the flange defining a surface configured to abut the crankcase, and a plurality of mounting holes extending from the surface through the body.
5. The cylinder of claim 1 , wherein the cylinder is formed by casting the body around an exterior of the first portion of the sleeve.
6. The cylinder of claim 1 , wherein the sleeve is manufactured from a section of tubing and the second portion is formed by machining an outer diameter of the tubing section.
7. The cylinder of claim 6 , wherein the outer diameter of the second portion is about 4.068 inches.
8. The cylinder of claim 1 , wherein the sleeve is constructed from SAE grade 4140 steel.
9. The cylinder of claim 1 , wherein the second wall thickness is greater than 0.025 inch.
10. The cylinder of claim 1 , wherein the second wall thickness is less than 0.040 inch.
11. The cylinder of claim 1 , wherein the second wall thickness is between 0.033 inch and 0.035 inch.
12. A cylinder for a V-twin engine, the cylinder comprising:
a body including a first end having a surface configured to mate with a cylinder head, and a second end configured to mate with a crankcase; and
a sleeve fixedly secured within the body to define a cylinder bore;
wherein the sleeve includes a first portion that extends from the first end of the body to the second end of the body; the first portion of the sleeve having a first wall thickness;
wherein the sleeve further includes a second portion that extends out of the second end of the body to be received within a crankcase bore, the second portion having a second wall thickness that is thinner than the first wall thickness;
wherein the second wall thickness is greater than 0.025 inch and less than 0.040 inch; and
wherein the sleeve is constructed from SAE grade 4140 steel.
13. The cylinder of claim 12 , wherein the body includes an exterior surface having a plurality of fins.
14. The cylinder of claim 12 , wherein the body is solid, having no internal voids or cooling jackets for cooling liquid.
15. The cylinder of claim 12 , wherein the body further includes a flange proximate to the second end, the flange defining a surface configured to abut the crankcase, and a plurality of mounting holes extending from the surface through the body.
16. The cylinder of claim 12 , wherein the cylinder is formed by casting the body around an exterior of the first portion of the sleeve.
17. The cylinder of claim 12 , wherein the sleeve is manufactured from a section of tubing that is machined to achieve the outer diameter of the second portion.
18. The cylinder of claim 12 , wherein a diameter of the cylinder bore is greater than 3.948 inches.
19. The cylinder of claim 12 , wherein a diameter of the cylinder bore is about 4.000 inches.
20. The cylinder of claim 12 , wherein the second wall thickness is greater than 0.030 inch.
21. The cylinder of claim 12 , wherein the second wall thickness is between 0.033 inch and 0.035 inch.
22. The cylinder of claim 12 , wherein the cylinder bore has a diameter of about 4.000 inches.